Gabriel Jesus scored his first Premier League goal as Manchester City comfortably beat West Ham 4-0 at the London Stadium on Wednesday.
Having beaten the Hammers 5-0 in the FA Cup on their previous trip to east London in January, Pep Guardiola's side raced into a three-goal half-time lead thanks to goals from Kevin De Bruyne, David Silva and Jesus, who was preferred in attack to Sergio Aguero.
Yaya Toure added a penalty after the break to cap a dominant performance as West Ham, who handed debuts to Jose Fonte and Robert Snodgrass, struggled to cope with City's pace.
Willy Caballero, replacing Claudio Bravo in goal, barely had a save to make en route to victory, which keeps City in fifth place, moving them level on points with Liverpool in fourth, while the Hammers remain 11th.
Guardiola made three changes from their 3-0 FA Cup fourth-round win over Crystal Palace, leaving Bravo and Aguero on the bench.
It gave Jesus an opportunity to make his full league debut for City and the January signing followed up his bright display at Selhurst Park with a superb performance.
His pass allowed De Bruyne to side-foot home City's opener on 17 minutes, capitalising on a dreadful mistake from Aaron Cresswell.
The lively Leroy Sane turned provided for the visitors' second, nutmegging Sam Byram before driving past Fonte and teeing up Silva to tap past Darren Randolph.
And Guardiola's side capped a devastating first-half display with their third before the break.
West Ham were architects of their own downfall for a second time, though, with Pedro Obiang guilty of conceding possession cheaply in his own half.
City took full advantage as Sane's piercing through ball found Sterling, who drew out Randolph and unselfishly set up Jesus to score his first goal in English football.
Slaven Bilic introduced Snodgrass shortly after the interval but the former Hull playmaker had little chance to make an impact before City scored their fourth.
Fonte, who endured a difficult night on his first appearance since moving from Southampton, upended Sterling to concede a penalty, which Toure dispatched past Randolph.
Aguero was introduced for the last 20 minutes but with the game already won, City eased up in the final stages.
Michail Antonio had a goal correctly ruled out for offside, while referee Kevin Friend turned down a hopeful Hammers penalty appeal after the ball popped up onto Jesus' arm following a challenge from Fabian Delph on Byram.
Bilic's side will look to bounce back when they travel to Southampton next in the Premier League on Saturday. City host relegation-threatened Swansea at the Etihad on Sunday.
Player ratings
West Ham: Randolph (5), Reid (5), Cresswell (3), Carroll (5), Lanzini (6), Obiang (5), Noble (5), Byram (5), Fonte (4), Antonio (5), Feghouli (5)
Subs used: Snodgrass (6), Fernandes (6), Fletcher (6)
Man City: Caballero (7), Sagna (7), Kolarov (7), Stones (8), Otamendi (7), Sterling (9), De Bruyne (9), Silva (9), Toure (8), Jesus (9), Sane (9)
Subs used: Fernandinho (7), Delph (7), Aguero (7)
Man of the match: Gabriel Jesus